The Internationalization extension exposes functionality of the ICU library to PHP.

This extension has been bundled with PHP since version 5.3. This PECL version backports improvements made in the development version of PHP to PHP 5.2-5.4. Version 3.0 is in sync with PHP 5.5; binaries are nonetheless provided here. They may be preferrable to those bundled with PHP 5.5 due to being compiled against a more recent version of ICU.